modify_node · Godot MCP: Risk & Policy

WHAT IT DOES

What modify_node does on Godot

AI agents use modify_node to create or update resources in Godot — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Godot environment.

PARAMETERS

Parameter	Type	Required	Description
`new_name`	object	—	New name (rename the node)
`node_path`	string	Yes	Node path to modify (e.g. "Player" or "Main/Enemy")
`properties`	object	—	Properties to set (key=value)
`scene_path`	string	Yes	Path to .tscn file

Parameters from the server's own tool schema.

WHY IT NEEDS A POLICY

Why modify_node needs a policy

This tool modifies existing node properties or renames nodes, which are reversible changes to the scene structure. It does not execute arbitrary code, delete nodes, or trigger financial operations. While it can affect game behavior through property changes, the modifications are non-destructive and can be undone.

From the tool's definition Tool name 'modify_node' and description 'Modify node properties or rename' indicate creation or modification of data within the Godot scene tree.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

modify_node Rate-limited

modify_node stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "modify_node": {
      "limits": [
        {
          "counter": "modify_node_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Godot, so you can run agents against it safely.

FAQ

Questions about modify_node

What does the modify_node tool do? +

Modify node properties or rename. It is categorised as a Write tool in the Godot MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

What parameters does modify_node accept? +

modify_node accepts 4 parameters: new_name, node_path, properties, scene_path. Required: node_path, scene_path. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on modify_node? +

Register the Godot MCP server in PolicyLayer and add a rule for modify_node: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Godot. Nothing to install.

What risk level is modify_node? +

modify_node is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit modify_node? +

Yes. Add a rate_limit block to the modify_node rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block modify_node completely? +

Set action: deny in the PolicyLayer policy for modify_node. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides modify_node? +

modify_node is provided by the Godot MCP server (@yanhuifair/godot-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.